The figure of Satan did not begin in the Christian Bible. This film traces the idea of an adversary to God back roughly 3500 years to ancient Persia, where Zoroastrian belief split the cosmos into opposing forces of light and darkness. From there it follows the concept through Jewish scripture, where the word originally meant simply an accuser or obstacle, into the early Christian church, where clerics reshaped the figure into a symbol of heresy and moral danger. Historians and religious scholars walk through how the Devil's image accumulated its horns, hooves, and pitchfork over centuries of art and folklore, and how each era reinvented him to suit its own anxieties, from medieval witch panics to modern pop culture. The film treats the Devil less as a theological fact than as a evolving cultural character, shaped by whichever society needed an enemy. It closes on the modern satanic and left-hand-path movements that have reclaimed the figure for their own purposes, far from his Persian origins.